What is the recommended slump range for beams and slabs requiring medium workability?

Question

Question

This question was previously asked in

RRB JE CBT 2 (Civil Engineering) ReExam Official Paper (Held On: 04 Jun, 2025)

Answer 1

Concept:

Below are the values of slump and their usage:

Placing Condition	Degree of Workability	Slump, mm
Mud mat, shallow section, pavement using pavers	Very low	0.70 – 0.80 (Compacting factor)
Mass concrete; lightly reinforced slabs, beams, walls, columns; strip footings	Low	25-75
Heavily reinforced slabs, beams, walls, columns	Medium	50-100
Slip formwork, pumped concrete	Medium	75-100
In situ piling, trench fill	High	100-150
Tremie concrete	Very high	150-200 (flow test as per IS 9103:1999)

Hence, it is clear that for slump value 50-100 mm the workability is medium and can be used for beams